vicegerent n 1: someone appointed by a ruler as an administrative deputy
Vicegerent \Vice*ge"rent\, a. [Vice, a. + gerent: cf. F. vice-g['e]rant.] Having or exercising delegated power; acting by substitution, or in the place of another. --Milton. [1913 Webster]
Vicegerent \Vice*ge"rent\, n. An officer who is deputed by a superior, or by proper authority, to exercise the powers of another; a lieutenant; a vicar. --Bacon. [1913 Webster] The symbol and vicegerent of the Deity. --C. A. Young. [1913 Webster]